# Introduction:
Department

Here are preliminary results of the bibliometric mapping of the 2022 Luxembourg research evaluation. Its purpose is:

The method for the research-field-mapping can be reiviewed here:

Rakas, M., & Hain, D. S. (2019). The state of innovation system research: What happens beneath the surface?. Research Policy, 48(9), 103787.

Seed Articles

The seed articles deemed representative for the active areas of research in the institution, and include authors affiliated with the institution. They can be selected in three ways:

  1. Via bibliographic clustering of the institutions publications and selection of most central articles per cluster (only clsuters where n >= 0.05N). Selection can be found at: https://github.com/daniel-hain/biblio_lux_2022/blob/master/output/seed/scopus_lih_dph_seed.csv
  2. Manual selection of relevant publications.
  3. A combination of 1. and 2.

The present analysis is based on the following seed articles:

AU PY TI JI
IDDIR M;DINGEO G;PORRAS YAR… 2020 INFLUENCE OF SOY AND WHEY PROTEIN, GELATIN AND SODIUM CASEINATE ON CAROTENOID BIOACCESSIBILITY FOOD. FUNCT.
MALISOUX L;DELATTRE N;URHAU… 2020 SHOE CUSHIONING INFLUENCES THE RUNNING INJURY RISK ACCORDING TO BODY MASS: A RANDOMIZED CONTROLLE… AM. J. SPORTS MED.
ARDERN CL;EKÅS GR;GRINDEM H… 2018 2018 INTERNATIONAL OLYMPIC COMMITTEE CONSENSUS STATEMENT ON PREVENTION, DIAGNOSIS AND MANAGEMENT … BR. J. SPORTS MED.
HAY SI;ABAJOBIR AA;ABATE KH… 2017 GLOBAL, REGIONAL, AND NATIONAL DISABILITY-ADJUSTED LIFE-YEARS (DALYS) FOR 333 DISEASES AND INJURI… LANCET
APPENZELLER BMR;HARDY EM;GR… 2017 HAIR ANALYSIS FOR THE BIOMONITORING OF PESTICIDE EXPOSURE: COMPARISON WITH BLOOD AND URINE IN A R… ARCH. TOXICOL.
DEVAUX Y;CREEMERS EE;BOON R… 2017 CIRCULAR RNAS IN HEART FAILURE EUR. J. HEART FAIL.

Topic modelling

Here, we report the results of a LDA topic-modelling (basically, clustering on words) on all title+abstract texts.

Topics by topwords

Note: While this static vies is helpful, I recommend using the interactive LDAVis version to be found under https://daniel-hain.github.io/biblio_lux_2022/output/topic_modelling/LDAviz_lih_dph.rds/index.html#topic=1&lambda=0.60&term=. For functionality and usage, see technical description in the next tab.

Topics over time

Technical Description

LDA Topic Modelling

Topic modeling is a type of statistical modeling for discovering the abstract “topics” that occur in a collection of documents. Latent Dirichlet Allocation (LDA) is an example of topic model and is used to classify text in a document to a particular topic.

LDA is a generative probabilistic model that assumes each topic is a mixture over an underlying set of words, and each document is a mixture of over a set of topic probabilities. It builds a topic per document model and words per topic model, modeled as Dirichlet distributions.

LDAVis

LDAvis is a web-based interactive visualisation of topics estimated using LDA. It provides a global view of the topics (and how they differ from each other), while at the same time allowing for a deep inspection of the terms most highly associated with each individual topic. The package extracts information from a fitted LDA topic model to inform an interactive web-based visualization. The visualisation has two basic pieces.

The left panel visualise the topics as circles in the two-dimensional plane whose centres are determined by computing the Jensen–Shannon divergence between topics, and then by using multidimensional scaling to project the inter-topic distances onto two dimensions. Each topic’s overall prevalence is encoded using the areas of the circles.

The right panel depicts a horizontal bar chart whose bars represent the individual terms that are the most useful for interpreting the currently selected topic on the left. A pair of overlaid bars represent both the corpus-wide frequency of a given term as well as the topic-specific frequency of the term.

The \(\lambda\) slider allows to rank the terms according to term relevance. By default, the terms of a topic are ranked in decreasing order according their topic-specific probability ( \(\lambda\) = 1 ). Moving the slider allows to adjust the rank of terms based on much discriminatory (or “relevant”) are for the specific topic. The suggested optimal value of \(\lambda\) is 0.6.

Knowledge Bases: Co-Citation network analysis

Note: This analysis refers the co-citation analysis, where the cited references and not the original publications are the unit of analysis. See tab Technical descriptionfor additional explanations

Knowledge Bases summary

In order to partition networks into components or clusters, we deploy a community detection technique based on the Lovain Algorithm (Blondel et al., 2008). The Lovain Algorithm is a heuristic method that attempts to optimize the modularity of communities within a network by maximizing within- and minimizing between-community connectivity. We identify the following communities = knowledge bases.

com name dgr_int dgr
Knowledge Base 1: KB 1 (n = 2194, density =15.28)
1 HANSEN T.B. JENSEN T.I. CLAUSEN B.H. BRAMSEN J.B. FINSEN B. DAMGAARD C.K. KJEMS J. NATURAL RNA CIRCLES FUNCTION AS EFFICIENT MICRORNA SPONGES (2013) 19464 19738
1 JECK W.R. SORRENTINO J.A. WANG K. SLEVIN M.K. BURD C.E. LIU J. MARZLUFF W.F. SHARPLESS N.E. CIRCULAR RNAS ARE ABUNDANT CONSERVED AND ASSOCIATED WIT… 16117 16324
1 SALZMAN J. GAWAD C. WANG P.L. LACAYO N. BROWN P.O. CIRCULAR RNAS ARE THE PREDOMINANT TRANSCRIPT ISOFORM FROM HUNDREDS OF HUMAN GENES IN DIVERSE CEL… 13929 17280
1 SALZMAN J. CHEN R.E. OLSEN M.N. WANG P.L. BROWN P.O. CELL-TYPE SPECIFIC FEATURES OF CIRCULAR RNA EXPRESSION (2013) 13576 17162
1 ASHWAL-FLUSS R. MEYER M. PAMUDURTI N.R. IVANOV A. BARTOK O. HANAN M. EVANTAL N. KADENER S. CIRCRNA BIOGENESIS COMPETES WITH PRE-MRNA SPLICING (2014) 13496 13667
1 JECK W.R. SHARPLESS N.E. DETECTING AND CHARACTERIZING CIRCULAR RNAS (2014) 13441 16399
1 ZHANG X.O. WANG H.B. ZHANG Y. LU X. CHEN L.L. YANG L. COMPLEMENTARY SEQUENCE-MEDIATED EXON CIRCULARIZATION (2014) 11318 14052
1 GUO J.U. AGARWAL V. GUO H. BARTEL D.P. EXPANDED IDENTIFICATION AND CHARACTERIZATION OF MAMMALIAN CIRCULAR RNAS (2014) 10900 13418
1 ZHANG Y. ZHANG X.O. CHEN T. XIANG J.F. YIN Q.F. XING Y.H. ZHU S. CHEN L.L. CIRCULAR INTRONIC LONG NONCODING RNAS (2013) 10505 10612
1 CONN S.J. PILLMAN K.A. TOUBIA J. CONN V.M. SALMANIDIS M. PHILLIPS C.A. ROSLAN S. GOODALL G.J. THE RNA BINDING PROTEIN QUAKING REGULATES FORMATION O… 10300 10406
Knowledge Base 2: KB 2 (n = 2031, density =2.44)
2 MCCLEMENTS D.J. LI Y. STRUCTURED EMULSION-BASED DELIVERY SYSTEMS: CONTROLLING THE DIGESTION AND RELEASE OF LIPOPHILIC FOOD COMPONENTS (2010) 1747 1747
2 MCCLEMENTS D.J. PROTEIN-STABILIZED EMULSIONS (2004) 1605 1605
2 SINGH H. YE A. HORNE D. STRUCTURING FOOD EMULSIONS IN THE GASTROINTESTINAL TRACT TO MODIFY LIPID DIGESTION (2009) 1267 1267
2 GOLDING M. WOOSTER T.J. THE INFLUENCE OF EMULSION STRUCTURE AND STABILITY ON LIPID DIGESTION (2010) 1125 1125
2 SALVIA-TRUJILLO L. QIAN C. MARTÍN-BELLOSO O. MCCLEMENTS D.J. INFLUENCE OF PARTICLE SIZE ON LIPID DIGESTION AND Β-CAROTENE BIOACCESSIBILITY IN EMULS… 1092 1092
2 MCCLEMENTS D.J. CRITICAL REVIEW OF TECHNIQUES AND METHODOLOGIES FOR CHARACTERIZATION OF EMULSION STABILITY (2007) 879 879
2 SINGH H. YE A. STRUCTURAL AND BIOCHEMICAL FACTORS AFFECTING THE DIGESTION OF PROTEIN-STABILIZED EMULSIONS (2013) 861 861
2 MCCLEMENTS D.J. LI Y. REVIEW OF IN VITRO DIGESTION MODELS FOR RAPID SCREENING OF EMULSION-BASED SYSTEMS (2010) 842 842
2 ZHANG R. ZHANG Z. ZHANG H. DECKER E.A. MCCLEMENTS D.J. INFLUENCE OF EMULSIFIER TYPE ON GASTROINTESTINAL FATE OF OIL-IN-WATER EMULSIONS CONTAINING A… 820 820
2 DICKINSON E. FLOCCULATION OF PROTEIN-STABILIZED OIL-IN-WATER EMULSIONS (2010) 813 813
Knowledge Base 3: KB 3 (n = 1284, density =6.19)
3 GRINDEM H. SNYDER-MACKLER L. MOKSNES H. ENGEBRETSEN L. RISBERG M.A. SIMPLE DECISION RULES CAN REDUCE REINJURY RISK BY 84% AFTER ACL RECONSTRUCTION:… 3656 3744
3 PATERNO M.V. RAUH M.J. SCHMITT L.C. FORD K.R. HEWETT T.E. INCIDENCE OF SECOND ACL INJURIES 2 YEARS AFTER PRIMARY ACL RECONSTRUCTION AND RETURN TO S… 2543 2771
3 ARDERN C.L. TAYLOR N.F. FELLER J.A. WEBSTER K.E. FIFTY-FIVE PER CENT RETURN TO COMPETITIVE SPORT FOLLOWING ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTIO… 2334 2422
3 KYRITSIS P. BAHR R. LANDREAU P. MILADI R. WITVROUW E. LIKELIHOOD OF ACL GRAFT RUPTURE: NOT MEETING SIX CLINICAL DISCHARGE CRITERIA BEFORE RETURN TO… 2324 2369
3 ARDERN C.L. WEBSTER K.E. TAYLOR N.F. FELLER J.A. RETURN TO SPORT FOLLOWING ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTION SURGERY: A SYSTEMATIC REVIEW A… 2194 2267
3 WIGGINS A.J. GRANDHI R.K. SCHNEIDER D.K. STANFIELD D. WEBSTER K.E. MYER G.D. RISK OF SECONDARY INJURY IN YOUNGER ATHLETES AFTER ANTERIOR CRUCIATE L… 2160 2455
3 BARBER-WESTIN S.D. NOYES F.R. FACTORS USED TO DETERMINE RETURN TO UNRESTRICTED SPORTS ACTIVITIES AFTER ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTION (2… 1833 1877
3 WEBSTER K.E. FELLER J.A. LAMBROS C. DEVELOPMENT AND PRELIMINARY VALIDATION OF A SCALE TO MEASURE THE PSYCHOLOGICAL IMPACT OF RETURNING TO SPORT FOL… 1522 1554
3 PATERNO M.V. SCHMITT L.C. FORD K.R. BIOMECHANICAL MEASURES DURING LANDING AND POSTURAL STABILITY PREDICT SECOND ANTERIOR CRUCIATE LIGAMENT INJURY A… 1510 1702
3 PATERNO M.V. RAUH M.J. SCHMITT L.C. FORD K.R. HEWETT T.E. INCIDENCE OF CONTRALATERAL AND IPSILATERAL ANTERIOR CRUCIATE LIGAMENT (ACL) 1393 1454
Knowledge Base 4: KB 4 (n = 1149, density =7.35)
4 ANDERSON A.F. ANDERSON C.N. CORRELATION OF MENISCAL AND ARTICULAR CARTILAGE INJURIES IN CHILDREN AND ADOLESCENTS WITH TIMING OF ANTERIOR CRUCIATE L… 1315 1654
4 LAWRENCE J.T. ARGAWAL N. GANLEY T.J. DEGENERATION OF THE KNEE JOINT IN SKELETALLY IMMATURE PATIENTS WITH A DIAGNOSIS OF AN ANTERIOR CRUCIATE LIGAME… 1314 1433
4 KOCHER M.S. GARG S. MICHELI L.J. PHYSEAL SPARING RECONSTRUCTION OF THE ANTERIOR CRUCIATE LIGAMENT IN SKELETALLY IMMATURE PREPUBESCENT CHILDREN AND … 1306 1401
4 SOLIGARD T. MYKLEBUST G. STEFFEN K. COMPREHENSIVE WARM-UP PROGRAMME TO PREVENT INJURIES IN YOUNG FEMALE FOOTBALLERS: CLUSTER RANDOMISED CONTROLLED … 1235 1293
4 DODWELL E.R. LAMONT L.E. GREEN D.W. PAN T.J. MARX R.G. LYMAN S. 20 YEARS OF PEDIATRIC ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTION IN NEW YORK STATE (… 864 1245
4 LAUERSEN J.B. BERTELSEN D.M. ANDERSEN L.B. THE EFFECTIVENESS OF EXERCISE INTERVENTIONS TO PREVENT SPORTS INJURIES: A SYSTEMATIC REVIEW AND META-ANA… 811 832
4 CALVO R. FIGUEROA D. GILI F. TRANSPHYSEAL ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTION IN PATIENTS WITH OPEN PHYSES: 10-YEAR FOLLOW-UP STUDY (2015) 794 834
4 ANDERSON A.F. TRANSEPIPHYSEAL REPLACEMENT OF THE ANTERIOR CRUCIATE LIGAMENT USING QUADRUPLE HAMSTRING GRAFTS IN SKELETALLY IMMATURE PATIENTS (2004) 787 800
4 SOLIGARD T. NILSTAD A. STEFFEN K. COMPLIANCE WITH A COMPREHENSIVE WARM-UP PROGRAMME TO PREVENT INJURIES IN YOUTH FOOTBALL (2010) 771 787
4 KOCHER M.S. SAXON H.S. HOVIS W.D. HAWKINS R.J. MANAGEMENT AND COMPLICATIONS OF ANTERIOR CRUCIATE LIGAMENT INJURIES IN SKELETALLY IMMATURE PATIENTS:… 762 786
Knowledge Base 5: KB 5 (n = 1043, density =2.29)
5 WOODRUFF T.J. ZOTA A.R. SCHWARTZ J.M. ENVIRONMENTAL CHEMICALS IN PREGNANT WOMEN IN THE UNITED STATES: NHANES 2003-2004 (2011) 835 835
5 WOODRUFF T.J. ZOTA A.R. SCHWARTZ J.M. ENVIRONMENTAL CHEMICALS IN PREGNANT WOMEN IN THE UNITED STATES: NHANES 2003–2004 (2011) 816 816
5 OULHOTE Y. BOUCHARD M.F. URINARY METABOLITES OF ORGANOPHOSPHATE AND PYRETHROID PESTICIDES AND BEHAVIORAL PROBLEMS IN CANADIAN CHILDREN (2013) 613 613
5 HORNUNG R.W. REED L.D. ESTIMATION OF AVERAGE CONCENTRATION IN THE PRESENCE OF NONDETECTABLE VALUES (1990) 366 366
5 FERGUSON K.K. MCELRATH T.F. MEEKER J.D. ENVIRONMENTAL PHTHALATE EXPOSURE AND PRETERM BIRTH (2014) 259 259
5 VANDENBERG L.N. HAUSER R. MARCUS M. OLEA N. WELSHONS W.V. HUMAN EXPOSURE TO BISPHENOL A (BPA) 240 240
5 PERRIER F. GIORGIS-ALLEMAND L. SLAMA R. PHILIPPAT C. WITHIN-SUBJECT POOLING OF BIOLOGICAL SAMPLES TO REDUCE EXPOSURE MISCLASSIFICATION IN BIOMARKER… 223 223
5 BRAUN J.M. KALKBRENNER A.E. CALAFAT A.M. BERNERT J.T. YE X. SILVA M.J. VARIABILITY AND PREDICTORS OF URINARY BISPHENOL A CONCENTRATIONS DURING PREG… 208 208
5 SILVA M.J. SAMANDAR E. PREAU J.L. JR. REIDY J.A. NEEDHAM L.L. CALAFAT A.M. QUANTIFICATION OF 22 PHTHALATE METABOLITES IN HUMAN URINE (2007) 196 196
5 ESKENAZI B. MARKS A.R. BRADMAN A. HARLEY K. BARR D.B. JOHNSON C. MORGA N. JEWELL N.P. ORGANOPHOSPHATE PESTICIDE EXPOSURE AND NEURODEVELOPMENT IN YO… 196 196
Knowledge Base 6: KB 6 (n = 765, density =22.64)
6 HANSEN T.B. JENSEN T.I. CLAUSEN B.H. BRAMSEN J.B. FINSEN B. DAMGAARD C.K. NATURAL RNA CIRCLES FUNCTION AS EFFICIENT MICRORNA SPONGES (2013) 5698 9096
6 MEMCZAK S. JENS M. ELEFSINIOTI A. TORTI F. KRUEGER J. RYBAK A. CIRCULAR RNAS ARE A LARGE CLASS OF ANIMAL RNAS WITH REGULATORY POTENCY (2013) 5542 8895
6 JECK W.R. SORRENTINO J.A. WANG K. SLEVIN M.K. BURD C.E. LIU J. CIRCULAR RNAS ARE ABUNDANT CONSERVED AND ASSOCIATED WITH ALU REPEATS (2013) 4665 7526
6 ASHWAL-FLUSS R. MEYER M. PAMUDURTI N.R. IVANOV A. BARTOK O. HANAN M. CIRCRNA BIOGENESIS COMPETES WITH PRE-MRNA SPLICING (2014) 4369 6902
6 LI Z. HUANG C. BAO C. CHEN L. LIN M. WANG X. EXON-INTRON CIRCULAR RNAS REGULATE TRANSCRIPTION IN THE NUCLEUS (2015) 3975 6242
6 ZHANG Y. ZHANG X.O. CHEN T. XIANG J.F. YIN Q.F. XING Y.H. CIRCULAR INTRONIC LONG NONCODING RNAS (2013) 3216 5142
6 CONN S.J. PILLMAN K.A. TOUBIA J. CONN V.M. SALMANIDIS M. PHILLIPS C.A. THE RNA BINDING PROTEIN QUAKING REGULATES FORMATION OF CIRCRNAS (2015) 3097 4810
6 LEGNINI I. DI TIMOTEO G. ROSSI F. MORLANDO M. BRIGANTI F. STHANDIER O. CIRC-ZNF609 IS A CIRCULAR RNA THAT CAN BE TRANSLATED AND FUNCTIONS IN MYOGEN… 2743 4314
6 PAMUDURTI N.R. BARTOK O. JENS M. ASHWAL-FLUSS R. STOTTMEISTER C. RUHE L. TRANSLATION OF CIRCRNAS (2017) 2700 4248
6 ZHENG Q. BAO C. GUO W. LI S. CHEN J. CHEN B. CIRCULAR RNA PROFILING REVEALS AN ABUNDANT CIRCHIPK3 THAT REGULATES CELL GROWTH BY SPONGING MULTIPLE M… 2425 3870
Knowledge Base 7: KB 7 (n = 731, density =6.14)
7 MILNER C.E. FERBER R. POLLARD C.D. HAMILL J. DAVIS I.S. BIOMECHANICAL FACTORS ASSOCIATED WITH TIBIAL STRESS FRACTURE IN FEMALE RUNNERS (2006) 1010 1016
7 VAN GENT R.N. SIEM D. VAN MIDDELKOOP M. VAN OS A.G. BIERMA-ZEINSTRA S.M. KOES B.W. INCIDENCE AND DETERMINANTS OF LOWER EXTREMITY RUNNING INJURIES I… 801 813
7 ZADPOOR A.A. NIKOOYAN A.A. THE RELATIONSHIP BETWEEN LOWER-EXTREMITY STRESS FRACTURES AND THE GROUND REACTION FORCE: A SYSTEMATIC REVIEW (2011) 800 800
7 DAVIS I.S. BOWSER B.J. MULLINEAUX D.R. GREATER VERTICAL IMPACT LOADING IN FEMALE RUNNERS WITH MEDICALLY DIAGNOSED INJURIES: A PROSPECTIVE INVESTIGA… 798 809
7 VAN DER WORP H. VRIELINK J.W. BREDEWEG S.W. DO RUNNERS WHO SUFFER INJURIES HAVE HIGHER VERTICAL GROUND REACTION FORCES THAN THOSE WHO REMAIN INJURY… 710 718
7 A SYSTEMATIC REVIEW ON RISK FACTORS AND SEX DIFFERENCES (2015) 686 704
7 YAMATO T.P. SARAGIOTTO B.T. LOPES A.D. A CONSENSUS DEFINITION OF RUNNING-RELATED INJURY IN RECREATIONAL RUNNERS: A MODIFIED DELPHI APPROACH (2015) 654 668
7 TAUNTON J.E. RYAN M.B. CLEMENT D.B. MCKENZIE D.C. LLOYD-SMITH D.R. ZUMBO B.D. A RETROSPECTIVE CASE-CONTROL ANALYSIS OF 2002 RUNNING INJURIES (2002) 577 588
7 CROWELL H.P. DAVIS I.S. GAIT RETRAINING TO REDUCE LOWER EXTREMITY LOADING IN RUNNERS (2011) 476 482
7 KLUITENBERG B. VAN MIDDELKOOP M. DIERCKS R. VAN DER WORP H. WHAT ARE THE DIFFERENCES IN INJURY PROPORTIONS BETWEEN DIFFERENT POPULATIONS OF RUNNERS… 456 465
Knowledge Base 8: KB 8 (n = 582, density =5.07)
8 GLOBAL REGIONAL AND NATIONAL DISABILITY-ADJUSTED LIFE-YEARS (DALYS) 780 780
8 BHATT S. WEISS D.J. CAMERON E. BISANZIO D. MAPPIN B. DALRYMPLE U. THE EFFECT OF MALARIA CONTROL ON PLASMODIUM FALCIPARUM IN AFRICA BETWEEN 2000 AND… 761 761
8 STEVENS G.A. ALKEMA L. BLACK R.E. GUIDELINES FOR ACCURATE AND TRANSPARENT HEALTH ESTIMATES REPORTING: THE GATHER STATEMENT (2016) 638 638
8 SALOMON J.A. HAAGSMA J.A. DAVIS A. DISABILITY WEIGHTS FOR THE GLOBAL BURDEN OF DISEASE 2013 STUDY (2015) 426 426
8 FOREMAN K.J. LOZANO R. LOPEZ A.D. MURRAY C.J. MODELING CAUSES OF DEATH: AN INTEGRATED APPROACH USING CODEM (2012) 386 389
8 BHATT S. WEISS D.J. CAMERON E. THE EFFECT OF MALARIA CONTROL ON PLASMODIUM FALCIPARUM IN AFRICA BETWEEN 2000 AND 2015 (2015) 284 284
8 GLOBAL REGIONAL AND NATIONAL AGE-SEX SPECIFIC MORTALITY FOR 264 CAUSES OF DEATH 1980–2016: A SYSTEMATIC ANALYSIS FOR THE GLOBAL BURDEN OF DISEASE S… 280 280
8 GLOBAL REGIONAL AND NATIONAL INCIDENCE PREVALENCE AND YEARS LIVED WITH DISABILITY FOR 328 DISEASES AND INJURIES FOR 195 COUNTRIES 1990–2016: A SYST… 267 267
8 RANSON H. LISSENDEN N. INSECTICIDE RESISTANCE IN AFRICAN ANOPHELES MOSQUITOES: A WORSENING SITUATION THAT NEEDS URGENT ACTION TO MAINTAIN MALARIA C… 239 239
8 GLOBAL REGIONAL AND NATIONAL COMPARATIVE RISK ASSESSMENT OF 84 BEHAVIOURAL ENVIRONMENTAL AND OCCUPATIONAL AND METABOLIC RISKS OR CLUSTERS OF RISKS … 231 231

Development of Knowledge Bases

Technical description

In a co-cittion network, the strength of the relationship between a reference pair \(m\) and \(n\) (\(s_{m,n}^{coc}\)) is expressed by the number of publications \(C\) which are jointly citing reference \(m\) and \(n\).

\[s_{m,n}^{coc} = \sum_i c_{i,m} c_{i,n}\]

The intuition here is that references which are frequently cited together are likely to share commonalities in theory, topic, methodology, or context. It can be interpreted as a measure of similarity as evaluated by other researchers that decide to jointly cite both references. Because the publication process is time-consuming, co-citation is a backward-looking measure, which is appropriate to map the relationship between core literature of a field.

Research Areas: Bibliographic coupling analysis

Research Areas main summary

This is arguably the more interesting part. Here, we identify the literature’s current knowledge frontier by carrying out a bibliographic coupling analysis of the publications in our corpus. This measure uses bibliographical information of publications to establish a similarity relationship between them. Again, method details to be found in the tab Technical description. As you will see, we identify the main research area, but also a set of adjacent research areas with some theoretical/methodological/application overlap.

To identify communities in the field’s knowledge frontier (labeled research areas) we again use the Lovain Algorithm (Blondel et al., 2008). We identify the following communities = research areas.

com_name AU PY TI dgr_int TC TC_year
Research Area 1: RA 1 (n = 1022, density =0.33)
RA 1 WIGGINS AJ;GRANDHI RK;… 2016 RISK OF SECONDARY INJURY IN YOUNGER ATHLETES AFTER ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTION 9.23 482 80.33
RA 1 GRINDEM H;SNYDER-MACKL… 2016 SIMPLE DECISION RULES CAN REDUCE REINJURY RISK BY 84% AFTER ACL RECONSTRUCTION: THE DELAWARE-OSLO ACL COHORT STUDY 4.29 493 82.17
RA 1 PATERNO MV;FLYNN K;THO… 2018 SELF-REPORTED FEAR PREDICTS FUNCTIONAL PERFORMANCE AND SECOND ACL INJURY AFTER ACL RECONSTRUCTION AND RETURN TO SPORT: A P… 19.57 81 20.25
RA 1 WELLSANDT E;FAILLA MJ;… 2017 LIMB SYMMETRY INDEXES CAN OVERESTIMATE KNEE FUNCTION AFTER ANTERIOR CRUCIATE LIGAMENT INJURY 9.68 159 31.80
RA 1 WEBSTER KE;FELLER JA 2016 EXPLORING THE HIGH REINJURY RATE IN YOUNGER PATIENTS UNDERGOING ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTION 5.66 252 42.00
RA 1 PATERNO MV;HUANG B;THO… 2017 CLINICAL FACTORS THAT PREDICT A SECOND ACL INJURY AFTER ACL RECONSTRUCTION AND RETURN TO SPORT: PRELIMINARY DEVELOPMENT OF… 16.54 78 15.60
RA 1 KYRITSIS P;BAHR R;LAND… 2016 LIKELIHOOD OF ACL GRAFT RUPTURE: NOT MEETING SIX CLINICAL DISCHARGE CRITERIA BEFORE RETURN TO SPORT IS ASSOCIATED WITH A F… 3.87 330 55.00
RA 1 WEBSTER KE;HEWETT TE 2019 WHAT IS THE EVIDENCE FOR AND VALIDITY OF RETURN-TO-SPORT TESTING AFTER ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTION SURGERY? … 12.64 94 31.33
RA 1 EKSTRAND J;WALDÉN M;HÄ… 2016 HAMSTRING INJURIES HAVE INCREASED BY 4% ANNUALLY IN MEN’S PROFESSIONAL FOOTBALL, SINCE 2001: A 13-YEAR LONGITUDINAL ANALYS… 3.61 327 54.50
RA 1 GOKELER A;WELLING W;ZA… 2017 DEVELOPMENT OF A TEST BATTERY TO ENHANCE SAFE RETURN TO SPORTS AFTER ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTION 8.37 136 27.20
Research Area 2: RA 2 (n = 953, density =0.15)
RA 2 MCCLEMENTS DJ;GUMUS CE 2016 NATURAL EMULSIFIERS — BIOSURFACTANTS, PHOSPHOLIPIDS, BIOPOLYMERS, AND COLLOIDAL PARTICLES: MOLECULAR AND PHYSICOCHEMICAL B… 3.82 451 75.17
RA 2 OZTURK B;MCCLEMENTS DJ 2016 PROGRESS IN NATURAL EMULSIFIERS FOR UTILIZATION IN FOOD EMULSIONS 2.64 239 39.83
RA 2 BAI L;HUAN S;LI Z;MCCL… 2017 COMPARISON OF EMULSIFYING PROPERTIES OF FOOD-GRADE POLYSACCHARIDES IN OIL-IN-WATER EMULSIONS: GUM ARABIC, BEET PECTIN, AND… 3.55 168 33.60
RA 2 CHANG Y;MCCLEMENTS DJ 2016 INFLUENCE OF EMULSIFIER TYPE ON THE IN VITRO DIGESTION OF FISH OIL-IN-WATER EMULSIONS IN THE PRESENCE OF AN ANIONIC MARINE… 4.50 126 21.00
RA 2 BAI L;HUAN S;GU J;MCCL… 2016 FABRICATION OF OIL-IN-WATER NANOEMULSIONS BY DUAL-CHANNEL MICROFLUIDIZATION USING NATURAL EMULSIFIERS: SAPONINS, PHOSPHOLI… 3.65 153 25.50
RA 2 TANG C-H 2017 EMULSIFYING PROPERTIES OF SOY PROTEINS: A CRITICAL REVIEW WITH EMPHASIS ON THE ROLE OF CONFORMATIONAL FLEXIBILITY 3.45 152 30.40
RA 2 WINUPRASITH T;KHOMEIN … 2018 ENCAPSULATION OF VITAMIN D3 IN PICKERING EMULSIONS STABILIZED BY NANOFIBRILLATED MANGOSTEEN CELLULOSE: IMPACT ON IN VITRO … 4.75 108 27.00
RA 2 ZHANG Z;ZHANG R;MCCLEM… 2016 ENCAPSULATION OF Β-CAROTENE IN ALGINATE-BASED HYDROGEL BEADS: IMPACT ON PHYSICOCHEMICAL STABILITY AND BIOACCESSIBILITY 4.56 104 17.33
RA 2 TAVERNIER I;WIJAYA W;V… 2016 FOOD-GRADE PARTICLES FOR EMULSION STABILIZATION 2.32 202 33.67
RA 2 BAI L;MCCLEMENTS DJ 2016 FORMATION AND STABILIZATION OF NANOEMULSIONS USING BIOSURFACTANTS: RHAMNOLIPIDS 3.45 126 21.00
Research Area 3: RA 3 (n = 770, density =0.14)
RA 3 HAY SI;ABAJOBIR AA;ABA… 2017 GLOBAL, REGIONAL, AND NATIONAL DISABILITY-ADJUSTED LIFE-YEARS (DALYS) FOR 333 DISEASES AND INJURIES AND HEALTHY LIFE EXPEC… 6.49 1168 233.60
RA 3 KYU HH;ABATE D;ABATE K… 2018 GLOBAL, REGIONAL, AND NATIONAL DISABILITY-ADJUSTED LIFE-YEARS (DALYS) FOR 359 DISEASES AND INJURIES AND HEALTHY LIFE EXPEC… 5.61 1289 322.25
RA 3 STANAWAY JD;AFSHIN A;G… 2018 GLOBAL, REGIONAL, AND NATIONAL COMPARATIVE RISK ASSESSMENT OF 84 BEHAVIOURAL, ENVIRONMENTAL AND OCCUPATIONAL, AND METABOLI… 3.25 1947 486.75
RA 3 VOS T;ABAJOBIR AA;ABBA… 2017 GLOBAL, REGIONAL, AND NATIONAL INCIDENCE, PREVALENCE, AND YEARS LIVED WITH DISABILITY FOR 328 DISEASES AND INJURIES FOR 19… 1.76 3488 697.60
RA 3 FITZMAURICE C;ALLEN C;… 2017 GLOBAL, REGIONAL, AND NATIONAL CANCER INCIDENCE, MORTALITY, YEARS OF LIFE LOST, YEARS LIVED WITH DISABILITY, AND DISABILIT… 2.25 2474 494.80
RA 3 FITZMAURICE C;AKINYEMI… 2018 GLOBAL, REGIONAL, AND NATIONAL CANCER INCIDENCE, MORTALITY, YEARS OF LIFE LOST, YEARS LIVED WITH DISABILITY, AND DISABILIT… 4.59 897 224.25
RA 3 GBD 2015 MORTALITY AND… 2016 GLOBAL, REGIONAL, AND NATIONAL LIFE EXPECTANCY, ALL-CAUSE MORTALITY, AND CAUSE-SPECIFIC MORTALITY FOR 249 CAUSES OF DEATH,… 1.11 3654 609.00
RA 3 KASSEBAUM NJ;ARORA M;B… 2016 GLOBAL, REGIONAL, AND NATIONAL DISABILITY-ADJUSTED LIFE-YEARS (DALYS) FOR 315 DISEASES AND INJURIES AND HEALTHY LIFE EXPEC… 3.05 1308 218.00
RA 3 FEIGIN VL;KRISHNAMURTH… 2017 GLOBAL, REGIONAL, AND NATIONAL BURDEN OF NEUROLOGICAL DISORDERS DURING 1990–2015: A SYSTEMATIC ANALYSIS FOR THE GLOBAL BUR… 3.50 1040 208.00
RA 3 FEIGIN VL;NICHOLS E;AL… 2019 GLOBAL, REGIONAL, AND NATIONAL BURDEN OF NEUROLOGICAL DISORDERS, 1990–2016: A SYSTEMATIC ANALYSIS FOR THE GLOBAL BURDEN OF… 3.35 1086 362.00
Research Area 4: RA 4 (n = 768, density =2.86)
RA 4 LI X;YANG L;CHEN L-L 2018 THE BIOGENESIS, FUNCTIONS, AND CHALLENGES OF CIRCULAR RNAS 49.11 880 220.00
RA 4 LEGNINI I;DI TIMOTEO G… 2017 CIRC-ZNF609 IS A CIRCULAR RNA THAT CAN BE TRANSLATED AND FUNCTIONS IN MYOGENESIS 37.32 1143 228.60
RA 4 PAMUDURTI NR;BARTOK O;… 2017 TRANSLATION OF CIRCRNAS 23.97 954 190.80
RA 4 EBBESEN KK;KJEMS J;HAN… 2016 CIRCULAR RNAS: IDENTIFICATION, BIOGENESIS AND FUNCTION 56.15 366 61.00
RA 4 VO JN;CIESLIK M;ZHANG … 2019 THE LANDSCAPE OF CIRCULAR RNA IN CANCER 31.61 647 215.67
RA 4 KULCHESKI FR;CHRISTOFF… 2016 CIRCULAR RNAS ARE MIRNA SPONGES AND CAN BE USED AS A NEW CLASS OF BIOMARKER 38.67 503 83.83
RA 4 ZHANG X-O;DONG R;ZHANG… 2016 DIVERSE ALTERNATIVE BACK-SPLICING AND ALTERNATIVE SPLICING LANDSCAPE OF CIRCULAR RNAS 43.33 448 74.67
RA 4 BARRETT SP;SALZMAN J 2016 CIRCULAR RNAS: ANALYSIS, EXPRESSION AND POTENTIAL FUNCTIONS 35.11 505 84.17
RA 4 GUARNERIO J;BEZZI M;JE… 2016 ONCOGENIC ROLE OF FUSION-CIRCRNAS DERIVED FROM CANCER-ASSOCIATED CHROMOSOMAL TRANSLOCATIONS 42.17 350 58.33
RA 4 LI Y;ZHENG F;XIAO X;XI… 2017 CIRCHIPK3 SPONGES MIR-558 TO SUPPRESS HEPARANASE EXPRESSION IN BLADDER CANCER CELLS 37.06 386 77.20
Research Area 5: RA 5 (n = 553, density =0.11)
RA 5 BRAUN JM 2017 EARLY-LIFE EXPOSURE TO EDCS: ROLE IN CHILDHOOD OBESITY AND NEURODEVELOPMENT 0.79 356 71.20
RA 5 GIULIVO M;LOPEZ DE ALD… 2016 HUMAN EXPOSURE TO ENDOCRINE DISRUPTING COMPOUNDS: THEIR ROLE IN REPRODUCTIVE SYSTEMS, METABOLIC SYNDROME AND BREAST CANCER… 0.65 326 54.33
RA 5 KIM K-H;KABIR E;JAHAN SA 2017 EXPOSURE TO PESTICIDES AND THE ASSOCIATED HUMAN HEALTH EFFECTS 0.25 710 142.00
RA 5 LEE J;CHOI K;PARK J;MO… 2018 BISPHENOL A DISTRIBUTION IN SERUM, URINE, PLACENTA, BREAST MILK, AND UMBILICAL CORD SERUM IN A BIRTH PANEL OF MOTHER–NEONA… 1.53 112 28.00
RA 5 SUNDERLAND EM;HU XC;DA… 2019 A REVIEW OF THE PATHWAYS OF HUMAN EXPOSURE TO POLY- AND PERFLUOROALKYL SUBSTANCES (PFASS) AND PRESENT UNDERSTANDING OF HEA… 0.34 505 168.33
RA 5 PHILIPS EM;JADDOE VWV;… 2018 BISPHENOL AND PHTHALATE CONCENTRATIONS AND ITS DETERMINANTS AMONG PREGNANT WOMEN IN A POPULATION-BASED COHORT IN THE NETHE… 1.83 89 22.25
RA 5 HAUSER R;GASKINS AJ;SO… 2016 URINARY PHTHALATE METABOLITE CONCENTRATIONS AND REPRODUCTIVE OUTCOMES AMONG WOMEN UNDERGOING IN VITRO FERTILIZATION: RESUL… 1.22 110 18.33
RA 5 SHEKHAR S;SOOD S;SHOWK… 2017 DETECTION OF PHENOLIC ENDOCRINE DISRUPTING CHEMICALS (EDCS) FROM MATERNAL BLOOD PLASMA AND AMNIOTIC FLUID IN INDIAN POPULA… 1.29 104 20.80
RA 5 OSAKA A;UEYAMA J;KONDO… 2016 EXPOSURE CHARACTERIZATION OF THREE MAJOR INSECTICIDE LINES IN URINE OF YOUNG CHILDREN IN JAPAN-NEONICOTINOIDS, ORGANOPHOSP… 1.22 96 16.00
RA 5 BRAUN JM;CHEN A;ROMANO… 2016 PRENATAL PERFLUOROALKYL SUBSTANCE EXPOSURE AND CHILD ADIPOSITY AT 8 YEARS OF AGE: THE HOME STUDY 0.84 124 20.67
Research Area 6: RA 6 (n = 403, density =0.48)
RA 6 CHAN ZYS;ZHANG JH;AU I… 2018 GAIT RETRAINING FOR THE REDUCTION OF INJURY OCCURRENCE IN NOVICE DISTANCE RUNNERS: 1-YEAR FOLLOW-UP OF A RANDOMIZED CONTRO… 4.69 85 21.25
RA 6 CEYSSENS L;VANELDEREN … 2019 BIOMECHANICAL RISK FACTORS ASSOCIATED WITH RUNNING-RELATED INJURIES: A SYSTEMATIC REVIEW 5.36 71 23.67
RA 6 BERTELSEN ML;HULME A;P… 2017 A FRAMEWORK FOR THE ETIOLOGY OF RUNNING-RELATED INJURIES 3.06 119 23.80
RA 6 MESSIER SP;MARTIN DF;M… 2018 A 2-YEAR PROSPECTIVE COHORT STUDY OF OVERUSE RUNNING INJURIES: THE RUNNERS AND INJURY LONGITUDINAL STUDY (TRAILS) 2.96 98 24.50
RA 6 RICE HM;JAMISON ST;DAV… 2016 FOOTWEAR MATTERS: INFLUENCE OF FOOTWEAR AND FOOT STRIKE ON LOAD RATES DURING RUNNING 5.00 57 9.50
RA 6 DAVIS IS;BOWSER BJ;MUL… 2016 GREATER VERTICAL IMPACT LOADING IN FEMALE RUNNERS WITH MEDICALLY DIAGNOSED INJURIES: A PROSPECTIVE INVESTIGATION 2.00 141 23.50
RA 6 NAPIER C;MACLEAN CL;MA… 2018 KINETIC RISK FACTORS OF RUNNING-RELATED INJURIES IN FEMALE RECREATIONAL RUNNERS 5.05 52 13.00
RA 6 HULME A;NIELSEN RO;TIM… 2017 RISK AND PROTECTIVE FACTORS FOR MIDDLE- AND LONG-DISTANCE RUNNING-RELATED INJURY 3.10 77 15.40
RA 6 DAVIS IS;RICE HM;WEARI… 2017 WHY FOREFOOT STRIKING IN MINIMAL SHOES MIGHT POSITIVELY CHANGE THE COURSE OF RUNNING INJURIES 4.69 46 9.20
RA 6 FRANCIS P;WHATMAN C;SH… 2019 THE PROPORTION OF LOWER LIMB RUNNING INJURIES BY GENDER, ANATOMICAL LOCATION AND SPECIFIC PATHOLOGY: A SYSTEMATIC REVIEW 3.38 62 20.67
Research Area 7: RA 7 (n = 333, density =3.56)
RA 7 MENG S;ZHOU H;FENG Z;X… 2017 CIRCRNA: FUNCTIONS AND PROPERTIES OF A NOVEL POTENTIAL BIOMARKER FOR CANCER 23.83 854 170.80
RA 7 KRISTENSEN LS;HANSEN T… 2018 CIRCULAR RNAS IN CANCER: OPPORTUNITIES AND CHALLENGES IN THE FIELD 19.22 801 200.25
RA 7 CHEN J;LI Y;ZHENG Q;BA… 2017 CIRCULAR RNA PROFILE IDENTIFIES CIRCPVT1 AS A PROLIFERATIVE FACTOR AND PROGNOSTIC MARKER IN GASTRIC CANCER 20.21 504 100.80
RA 7 ZHANG H-D;JIANG L-H;SU… 2018 CIRCRNA: A NOVEL TYPE OF BIOMARKER FOR CANCER 20.85 448 112.00
RA 7 HSIAO K-Y;LIN Y-C;GUPT… 2017 NONCODING EFFECTS OF CIRCULAR RNA CCDC66 PROMOTE COLON CANCER GROWTH AND METASTASIS 16.24 435 87.00
RA 7 YU J;XU Q-G;WANG Z-G;Y… 2018 CIRCULAR RNA CSMARCA5 INHIBITS GROWTH AND METASTASIS IN HEPATOCELLULAR CARCINOMA 17.09 390 97.50
RA 7 GREENE J;BAIRD A-M;BRA… 2017 CIRCULAR RNAS: BIOGENESIS, FUNCTION AND ROLE IN HUMAN DISEASES 20.80 317 63.40
RA 7 ZHANG M;HUANG N;YANG X… 2018 A NOVEL PROTEIN ENCODED BY THE CIRCULAR FORM OF THE SHPRH GENE SUPPRESSES GLIOMA TUMORIGENESIS 15.32 351 87.75
RA 7 HAN D;LI J;WANG H;SU X… 2017 CIRCULAR RNA CIRCMTO1 ACTS AS THE SPONGE OF MICRORNA-9 TO SUPPRESS HEPATOCELLULAR CARCINOMA PROGRESSION 6.66 784 156.80
RA 7 LASDA E;PARKER R 2016 CIRCULAR RNAS CO-PRECIPITATE WITH EXTRACELLULAR VESICLES: A POSSIBLE MECHANISM FOR CIRCRNA CLEARANCE 20.06 242 40.33
Research Area 8: RA 8 (n = 289, density =3.09)
RA 8 YANG Y;GAO X;ZHANG M;Y… 2018 NOVEL ROLE OF FBXW7 CIRCULAR RNA IN REPRESSING GLIOMA TUMORIGENESIS 17.12 584 146.00
RA 8 YANG Y;FAN X;MAO M;SON… 2017 EXTENSIVE TRANSLATION OF CIRCULAR RNAS DRIVEN BY N 6 -METHYLADENOSINE 10.50 885 177.00
RA 8 ZHANG Z;YANG T;XIAO J 2018 CIRCULAR RNAS: PROMISING BIOMARKERS FOR HUMAN DISEASES 16.24 316 79.00
RA 8 SHANG X;LI G;LIU H;LI … 2016 COMPREHENSIVE CIRCULAR RNA PROFILING REVEALS THAT HSA-CIRC-0005075, A NEW CIRCULAR RNA BIOMARKER, IS INVOLVED IN HEPATOCEL… 12.82 279 46.50
RA 8 MENG X;LI X;ZHANG P;WA… 2017 CIRCULAR RNA: AN EMERGING KEY PLAYER IN RNA WORLD 17.25 189 37.80
RA 8 XIA S;FENG J;LEI L;HU … 2017 COMPREHENSIVE CHARACTERIZATION OF TISSUE-SPECIFIC CIRCULAR RNAS IN THE HUMAN AND MOUSE GENOMES 14.58 195 39.00
RA 8 DONG Y;HE D;PENG Z;PEN… 2017 CIRCULAR RNAS IN CANCER: AN EMERGING KEY PLAYER 11.58 185 37.00
RA 8 WAN L;ZHANG L;FAN K;CH… 2016 CIRCULAR RNA-ITCH SUPPRESSES LUNG CANCER PROLIFERATION VIA INHIBITING THE WNT/Β-CATENIN PATHWAY 7.80 248 41.33
RA 8 NG WL;MOHD MOHIDIN TB;… 2018 FUNCTIONAL ROLE OF CIRCULAR RNAS IN CANCER DEVELOPMENT AND PROGRESSION 14.82 118 29.50
RA 8 FAN X;WENG X;ZHAO Y;CH… 2017 CIRCULAR RNAS IN CARDIOVASCULAR DISEASE: AN OVERVIEW 10.88 137 27.40

Development

Connectivity between the research areas

Technical description

In a bibliographic coupling network, the coupling-strength between publications is determined by the number of commonly cited references they share, assuming a common pool of references to indicate similarity in context, methods, or theory. Formally, the strength of the relationship between a publication pair \(i\) and \(j\) (\(s_{i,j}^{bib}\)) is expressed by the number of commonly cited references.

\[s_{i,j}^{bib} = \sum_m c_{i,m} c_{j,m}\]

Since our corpus contains publications which differ strongly in terms of the number of cited references, we normalize the coupling strength by the Jaccard similarity coefficient. Here, we weight the intercept of two publications’ bibliography (shared refeences) by their union (number of all references cited by either \(i\) or \(j\)). It is bounded between zero and one, where one indicates the two publications to have an identical bibliography, and zero that they do not share any cited reference. Thereby, we prevent publications from having high coupling strength due to a large bibliography (e.g., literature surveys).

\[S_{i,j}^{jac-bib} =\frac{C(i \cap j)}{C(i \cup j)} = \frac{s_{i,j}^{bib}}{c_i + c_j - s_{i,j}^{bib}}\]

More recent articles have a higher pool of possible references to co-cite to, hence they are more likely to be coupled. Consequently, bibliographic coupling represents a forward looking measure, and the method of choice to identify the current knowledge frontier at the point of analysis.

Knowledge Bases, Research Areas & Topics Interaction

Endnotes

All results are preliminary so far…